Earnings Per Share - Computations of Basic and Diluted Loss Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Earnings Per Share Disclosure [Line Items]
Net income attributable to Cinemark Holdings, Inc.		$ 45.8	$ 119.1	$ 70.6	$ 116.0
Income allocated to participating share-based awards	[1]	(0.9)	(2.3)	(1.2)	(1.9)
Basic net income (loss) attributable to common stockholders		44.9	116.8	69.4	114.1
Add: Interest expense on convertible notes, net of tax		4.7	4.6	9.4	9.8
Net Income (Loss) Available to Common Stockholders, Diluted, Total		$ 49.6	$ 121.4	$ 78.8	$ 123.9
Basic weighted average shares outstanding		119.9	119.1	119.7	118.9
Common equivalent shares for performance stock units		1.5	0.6	1.6	0.6
Common equivalent shares for convertible notes		32.0	32.0	32.0	32.0
Common equivalent shares for warrants	[2]	0.0	0.0	0.0	0.0
Diluted weighted average shares outstanding		153.4	151.7	153.3	151.5
Basic earnings per share attributable to common stockholders		$ 0.37	$ 0.98	$ 0.58	$ 0.96
Diluted earnings per share attributable to common stockholders		$ 0.32	$ 0.8	$ 0.51	$ 0.82

[1] For the three months ended June 30, 2024 and 2023, a weighted average of approximately 2.34 shares and 2.40 shares of restricted stock, respectively, were considered participating securities. For the six months ended June 30, 2024 and 2023, a weighted average of approximately 2.09 shares and 2.03 shares of restricted stock, respectively, were considered participating securities.

[2] For all periods presented, diluted earnings per share excludes the warrants, as they would be anti-dilutive.